Hey, I've been having weird stomach pains too and my doctor thinks it could be my gall bladder

Did he order an ultrasound? They can detect stones. If it doesn't detect stones then he'll order a HIDA scan which tests the function of the gallbladder by taking pictures of it with a radioactive tracer.

The Ultrasound takes 10 mins tops, the HIDA scan takes like 2 hours. Small stones/sludge was detected during my ultrasound and from my symptoms a surgeon was contacted etc..